Autorun is a toggle, not two seperate commands, so you won't have a spammable means of stopping autorun that does not cause movement. You can try setting up a seperate Autorun keybind if it's just 1 that you need to deal with, otherwise as far as I can tell, you're stuck with using forward/backward movement to break AF/AR.

I have this issue with my melee toon when she's running to interact with a target via melee and cast Stormstrike {I don't use follow strobing} and I simply have her follow me again. Melee interact from there will break autofollow.